Lining for pebble-mills.



No. 851,637. PATENTED APR. 30, 1907. M. F. ABBE.

LINING FOR PBB'BLE MILLS.

APPLIOATION FILED JAN.9,190'1.

Fay. I.

2 SHEETS-SHEET 1.

Nq. 851.637. I PATBNTED APR. 3o, 1907.

l M. F. ABBE.

LINING PoR PEBBLB MILLS.

APPLICATION FILED JAI. 9. 1907.

2 SHEETS-SHEET 2.

lffibzesses M MAX F. ABB, OF NEW YORK, N. Y.

LINING FOR PEBBLE-IVIILLS.

Specification of Letters Patent.

)Patented April 30, 1907.

Application filed January 9,1907. Serial No. 351,432.

To all whom, it 11i/ay cm1/cern:

tacliing a liner to the mill, each of its ends 17 Be it known that I, Mxx F. Aisii, a citiis rabbeted as at 18, (Fig. ll), the two rabbets Zen of the United States, residing at New York city, Manhattan, county and State of New York, have invented new and use'lul Improvements in Linings lor Pebble-Mills, of which the following is a specification.

This invention relates to a lining for pebble or ball mills, which is not apt to wear out along the seams and which may be readily fitted into the mill without requiring lengthy adj ustment.

In the accompanying drawings: Figure 1 is a cross section of a pebble mill provided with my improved lining; Fig. 2 a longitudinal section of the main body of the mill on line 2 2, Fig. 1 Fig. 3 a front elevation, partly broken away, of the mill; Fig. Ll an end view of one of the liners; Fig. 5 a face view thereof, and Fig. 6 ardetail ot' a modification o'lt the lining.

Vhile operating a grinding mill, each ol" the pebbles, as well as each of 'the particles to be ground, will move substantially in a plane at right angles to the axis of rotation. ll" the joints between the liners ltherefore coincide with such planes ol movement, a tendency arises for the charge to rapidly wear out the mortar at the joints, as well as the edges o'l the liners by cutting grooved paths into the seams. By my invention this objection is overcome, the liners being so constructed that the joints between them are inclined, and must be crossed by the moving particles while the mill is in operation.

As shown in the drawings, the cylindrical shell 10 of the mill containing the pebbles or balls 11, is rotatably mounted on standards 12 by gudgeons 13 projecting axially from the heads 111. The liners 15, which may be composed of metal, stone or other material, are so shaped and fitted in position, that the seams formed between their sides, extend obliquely partly across the mill, or in other words, in a direction from one oi' the heads le toward the other head. To ell'ect this result, the two sides 16 of the liner join the ends 17, at obtuse angles, and the liners are so laid that the ends 17 will assume a position parallel to the axis of the mill, when the sides 16 will assume the lateral detlection desired. This deflection may extend in opposite directions in adjoining courses to obtain a zigzag ell'ect, (Fig. 2), or it may extend in the same direction to obtain an oblique etlect, (Fig. 6).

In order to provide means for readily ati i l ol laterally adjoining liners forming a longitudinal keygroove ietween them. Into this groove is fitted a key or longitudinal bar 19 which extends over the reduced ends oi adjoining liners and is, perforated in aline ment with perlorations of shell 10, for the reception of connecting bolts 20. These bolts likewise pass through .openings formed by notches or recesses 21 at the edges of adj acent liners, which extend parallel to the axis ol the drinn. "hese notches are of such a length as to amply accommodate the bolts and permit the liners to be shifted to the position required. 1n this watT any dillicult boring of bolt-holes in the liner so as to have them register with those in the shell, is entirely obviated, and as the bar holds the liner down 'from end to end, the stability and strength ol the lining is greatly increased.

The liners should be curved to conform to the curvature of shell 10, and they are provided on their convex back with reinforcing ribs 22, that engage said shell. At their ends, the liners are provided with inwardly extending bulges 23 that llank and protect bar 19, besides forming oilsets for preventing any objectionable sliding action oi the contents ot the mill.. Of course the outer edge 24 of each end liner 25, extends parallel to head 14 against which it abuts.

l claim:

1. A pebble mill provided with liners hL ving ends that extend parallel to the axis oi' the mill, and sides that are inclined to such ends, substantially as specified.

2. A pebble mill provided with liners having reduced and notched ends, a bar extending over the reduced ends of adjoining liners, and bolts that secure the bar to the mill and pass through the openings formed by the notches of adjoining liners parallel to the axis o'l the mill, substantially as speciiied.

3. A pebble mill provided with liners having reduced ends, bulges Vllanking the saine, a bar extending ovei the reduced ends ol adjoining liners, and bolt-s that secure said bar to the mill, substantially as specified.

Signed by me at New York city, (Mani hattan,) N. Y., this 8th day of January, 1907.

MAX F. ABB.

Witnesses:

FRANK v. BRIESEN, WILLIAM ScnULz.

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